Updated changelog

Author: rbagd

CHANGELOG.md

@@ -44,6 +44,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#3022](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3022))
 - Replace all instrumentor unit test `assertEqualSpanInstrumentationInfo` calls with `assertEqualSpanInstrumentationScope` calls
   ([#3037](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3037))
+- `opentelemetry-instrumentation-sqlalchemy`: Fix a remaining memory leak in EngineTracer
+  ([#3053](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3053))
 
 ### Breaking changes